Preheat oven to 200°C/400°F; butter a 12-hole muffin pan – each hole holds 1/3 cup batter.
In a large bowl, sift together the flour, baking powder and salt. Mix in the sugar, coconut and chocolate chips.
In a small bowl, whisk together the butter, bananas, eggs and vanilla. Pour over the dry ingredients and whisk lightly with a fork – do not overmix the batter, otherwise you’ll end up with tough muffins.
Transfer the batter to the prepared pan and bake for 15 minutes or until risen and golden and a skewer inserted in the center of the muffins comes out clean.
Cool slightly in the pan, then turn out onto a rack to cool completely.